ABOUT CONGRESSIONAL TRADING IN BIIB
As of May 2026, 5 members of Congress have collectively executed 9 disclosed trades on BIIB (Biogen Inc. - Common Stock). This includes 4 purchases and 5 sales, with bipartisan cluster activity detected 0 times — instances where members of both parties traded BIIB within overlapping time windows, often a signal of coordinated information or policy-related activity.
MOST-ACTIVE TRADERS
The most active trader of BIIB on Signal Congress is Rob Bresnahan with 3 trades, followed by Gilbert Cisneros (1 trade) and Rohit Khanna (3 trades).
Signal Congress tracks BIIB congressional trades through STOCK Act PTR filings from the House Clerk XML feed and Senate eFD system. Each trade is scored for conviction (0–100 scale) based on filing speed, amount, and corroboration signals, and analyzed for alpha generation against the SPY benchmark over 60-day and 180-day windows.